81252048 has 40 divisors (see below), whose sum is σ = 210565888. Its totient is φ = 26998272.

The previous prime is 81252047. The next prime is 81252071. The reversal of 81252048 is 84025218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81252047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13665 + ... + 18687.

Almost surely, 2^81252048 is an apocalyptic number.

It is an amenable number.

81252048 is an abundant number, since it is smaller than the sum of its proper divisors (129313840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81252048 is a wasteful number, since it uses less digits than its factorization.

81252048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371 (or 5365 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 81252048 is about 9013.9917905443. The cubic root of 81252048 is about 433.1231917326.

The spelling of 81252048 in words is "eighty-one million, two hundred fifty-two thousand, forty-eight".